Virus Database

Konkoor.3072

Description Konkoor.3072

This is a very dangerous memory resident parasitic virus. It hooks INT 21h, intercepts the DOS function ChangeDir (AH=3Bh), and when that function is executed, the virus searches for EXE-files, and writes itself to the middle of the file. The virus has a memory allocation error, and may halt the system while infecting the files. The virus checks the file names for the text string, and does not infect these files:
SCAN
CLEAN
VSHIELD
FINDVIRU
FV386
FV86
CLEANBOO
VIVERIFY
CERT
MSAV
GUARD
TDUMP
Under DOS 4.x or earlier, the virus displays the following message, and returns to DOS:
Incorrect DOS version
On the 13th of any month, the virus overwrites the hard-drive MBR with a trigger program. While booting from this MBR, the program displays the following message:
Konkoor v2.0 - Crack Master - Last Days Of 1995
What Was The First Iranian Virus ?
1. Abbas ??? (Was it Iranian ?)
2. Roohi
3. TDD - Konkoor v1.0
4. None Of Above
-= This is The Last One If You Solve Copyright Problem =-
Choose the correct answerall
waits for key '3', and continues booting.

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JT8.1000

Description JT8.1000

It is not a dangerous nonmemory resident parasitic virus. It searches for .COM files (except COMMAND.COM), then writes itself to the end of the file. The virus deletes the CHKLIST.MS file, contains the text string:
-= JT-8 =-

Juda.1406

Description Juda.1406

Juda is a not dangerous encrypted parasitic virus. It hooks to INT 21h and writes itself to the end of .COM and .EXE files that are executed. The virus does not manifest itself in any way and contains text strings in Russian. One such string is as follows:
(virus: 'Judas' (beta1))

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